Patents by Inventor Pankaj Kumar Singh

Pankaj Kumar Singh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Intermediate compounds and their use in preparation of lacosamide
    Patent number: 8093426
    Abstract: The present invention is concerned with novel compounds and their use for the preparation of lacosamide. The present invention also contemplates processes for the preparation of lacosamide employing the novel compound of general Formula II, Formula IIa or Formula IIb as intermediate. Wherein R1 is —OH or —OMe; R2 is —OH or —NH—CH2—C6H5.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: January 10, 2012
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Mukesh Kumar Madhra, Pankaj Kumar Singh, Chandra Has Khanduri
  • INTERMEDIATE COMPOUNDS AND THEIR USE IN PREPARATION OF LACOSAMIDE
    Publication number: 20120004452
    Abstract: The present invention is concerned with novel compounds and their use for the preparation of lacosamide. The present invention also contemplates processes for the preparation of lacosamide employing the novel compound of general Formula II, Formula IIa or Formula IIb as intermediate. Wherein R1 is —OH or —OMe; R2 is —OH or —NH—CH2—C6H5.
    Type: Application
    Filed: June 7, 2011
    Publication date: January 5, 2012
    Inventors: Mukesh Kumar MADHRA, Pankaj Kumar Singh, Chandra Has Khanduri
  • INTERMEDIATE COMPOUNDS AND THEIR USE IN PREPARATION OF LACOSAMIDE
    Publication number: 20120004462
    Abstract: The present invention is concerned with novel compounds and their use for the preparation of lacosamide. The present invention also contemplates processes for the preparation of lacosamide employing the novel compound of general Formula II, Formula IIa or Formula IIb as intermediate. Wherein R1 is —OH or —OMe; R2 is —OH or —NH—CH2—C6H5.
    Type: Application
    Filed: June 7, 2011
    Publication date: January 5, 2012
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Mukesh Kumar MADHRA, Pankaj Kumar Singh, Chandra Has Khanduri
  • PROCESS FOR THE PREPARATION OF EFAVIRENZ
    Publication number: 20110071287
    Abstract: The present invention relates to a process for the preparation of Efavirenz (Formula I), wherein triphosgene is used as a cyclizing agent.
    Type: Application
    Filed: May 1, 2009
    Publication date: March 24, 2011
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Mukesh Kumar Madhra, Pankaj Kumar Singh, Mukesh Sharma, Chandra Has Khanduri
  • PROCESS FOR THE PREPARATION OF FORM I AND FORM II OF RITONAVIR
    Publication number: 20100099885
    Abstract: The present invention relates to processes for the preparation of Form I and Form II of Ritonavir, wherein no seed crystals are used.
    Type: Application
    Filed: October 1, 2007
    Publication date: April 22, 2010
    Inventors: Mukesh Kumar Sharma, Chandra Has Khanduri, Pankaj Kumar Singh, Yoginder Pal Sachdeva
  • INTERMEDIATE COMPOUNDS AND THEIR USE IN PREPARATION OF LACOSAMIDE
    Publication number: 20090143472
    Abstract: The present invention is concerned with novel compounds and their use for the preparation of lacosamide. The present invention also contemplates processes for the preparation of lacosamide employing the novel compound of general Formula II, Formula IIa or Formula IIb as intermediate. Wherein R1 is —OH or —OMe; R2 is —OH or —NH—CH2—C6H5.
    Type: Application
    Filed: December 3, 2008
    Publication date: June 4, 2009
    Inventors: Mukesh Kumar Madhra, Pankaj Kumar Singh, Chandra Has Khanduri